[time-nuts] Clock Powers of Ten

[d.seiter at comcast.net]

So you put a sensor on the neck of the hourglass, and rotate it whenever the sand stops falling.  You'd have to adjust the sand to make up for the rotation time, and to further calibrate it...

-Dave

 -------------- Original message ----------------------
From: Bruce Griffiths <bruce.griffiths at xtra.co.nz>
> Brooke Clarke wrote:
> > Hi Tom:
> >
> > Nice overview.
> >
> > I think in your Powers of Ten you showed a timepiece for which I don't 
> remember 
> > any data.  Since it's shown on  the last page does that mean the hour glass 
> has 
> > very good specs?
> >   
> How can it have (as a clock)?
> It isnt a periodic device by itself.
> Need to turn it into an oscillator/periodic device first before AVAR
> etc, can be measured.
> 
> Bruce
> 
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